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are you spose to use an exact result, or an empirical rule approximation?

also, are you using a ti83, or stat program, or do you have to use the tables in the book?

Tables in the book

find a z score, look it up in the table, work the results\[Z=\frac{X-mean}{sd}\]

since your mean = 48, and sd = 6
finding the z scores for the given info is simple enough

Yes

then the rest of it is working out the values from the table to address the given situations.

ok thanks for you help

good luck :)